Incandescent lamp.



'No. 694,068. Patented Feb. 25, I902.

' E. MGUUAT.

INGANDESGENT LAMP.

(A pplication "filed June '15, 1961.

(No Model.)

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UNITED STATES PATENT OFFICE.

EUGENE MCOUAT, OF MALDEN, MASSACHUSETTS.

INCANDESCENT LAMP.

SPECIFICATION forming part of Letters Patent N 0. 694,068, datedFebruary 25, 1902.

Application filed June 15, 1901.

To all whom it may concern:

Be it known that I, EUGENE MOOUAT, of Malden, in the county of Middlesexand State of Massachusetts, have invented a new and useful Improvementin Incandescent Lamps, of which the following, taken in connection withthe accompanying drawings, is a specification.

My invention relates to incandescent electric lamps of the class thathave attached reflectors; and it consists in making the bulb of the lampin a peculiar manner and also in forming and attaching the reflector.

The object is to improve the construction and to add to the usefulnessand durability of thelamp. This object Iattain by the means illustratedin the accompanying drawings, in which- Figure 1 is an elevation showingthe lamp complete. Fig. 2 is avertical section showing the glass partandthe filament. Fig. 3 is a plan of the reflector. Fig. 4 is anelevation of the reflector.

In the drawings Figs. 1 and 2 show a lamp of a peculiar design; but I donot wish to confine myself to any one design, as my invention will applyto most of the lamps of this class. The stem and filament shown are ofwell-known construction and may be varied in any desired manner. Theneck A of the bulb, as shown in Figs. 1 and 2, has a novel feature atN-that is, it is drawn in so as to become as small as possible and yetadmit of room for the stem S. The obj ectof thus drawing the neck in isto obtain all the space possible for utilizing the mirror-surface, andthus to get the advantage of the rays of light that pass upward from thefilament and which are of little value unless reflected and directed tothe place where the light is of the greatest use-that is, to the desk,table, or bench of the user. In other words, this arrangement enables meto place a mirror very near the Serial No. 64,747. (No model.)

source of light, so as to reflect the rays that would otherwise bewasted. The reflector consists of a thin shield R, of metal, havingamirror-surface on its under side-that is, the side that is toward thesource of light. This mirror R is thin and flexible and is cut on theline K, Fig. 3, so that it may be bent tempo: rarily in such a manner asto admit of its being placed upon the lamp. When so placed, it willspring back into its normal shape, and thus remain attached to the lamp,as shown in Fig. 1, the collar 0 fitting accurately about the contractedpart N of the neck of the bulb. This construction of the lamp and itsmirror admits of the renewalof the mirror when the same has become dullor otherwise defective.

I claiml. A bulb for an incandescent lamp, having a broadly-extended,flattened, spherical surface,immediately above the source of light, andhaving its neck, between the said flattened spherical surface and thecap, contracted to receive a reflector, whereby nearly all the upwardrays'of light are reflected, substantially as and for the purpose setforth.

2. An electric incandescent lamp, having a bulb, the neck of which-iscontracted between the cap and the body; and a mirrorshield in the formof a flattened spherical surface, adapted to closely fit the bulb, andhaving a small central opening, and cut radially from said opening tothe circumference, whereby it is adapted to be detachably attached tothe neck of the bulb, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 12th day of June, A. D.1901.

EUGENE MoOUAT. Witnesses:

WILLIAM EDSON, FRANK G. PARKER.

